1908 and later became a daily. First editor J. Jesensky was sympathetic to a radical interpretation of socialism and in the 1919 split of the Socialist Party of America the publication cast its lot with the Communist Party of America. Slovenian Proletarec (The Proletarian) (January 1906 - 1952) — Launched as a monthly at the start of 1906, for most of its long history Proletarec was a weekly broadsheet newspaper produced each Thursday in Chicago as the official organ of the Yugoslav Federation of the Socialist Party of America. The paper's primary language was Slovenian although for much of the paper's life it also included one or more pages in English, for the benefit of its younger readers. The paper is readily available on microfilm for the years 1918 to 1928, with the master negative held by the Wisconsin Historical Society in Madison. The paper continued into the decade of the 1950s, with the Center for Research Libraries holding a copy dated February 6, 1952. Ukrainian Robitnyk (The Worker) (January 1914 – June 1918) — Robitnyk was originally the official organ of the Ukrainian Federation of the Socialist Party of America and was published in Cleveland, Ohio, from the beginning of 1914. The paper was staunchly anti-militarist and an early supporter of the Zimmerwald Left internationally and the organized Left Wing Section of the Socialist Party domestically. In 1918 the paper's editorial staff was arrested by the police and publication was suspended from July 1918 for the duration of World War I. The publication moved its editorial offices to New York City and relaunched as a new paper called Robitnychyi Vistnyk. Yiddish Di Naye Welt (The New World) (August 1915 – March 1922) — Official organ of the Jewish Socialist Federation of the Socialist Party of America, edited by the head of the JSF, J.B. Salutsky — later known as "J.B.S. Hardman." Di Naye Welt stood in opposition to the moderate socialist views of the daily Forverts of Abraham Cahan, more so as the JSF moved steadily to the left at the close of the 1910s. From 1919 there was also considerable factional animosity between Salutsky and his Di Naye Welt and Alex Bittelman and his Der Kampf — an ongoing personal and ideological battle which played itself out for the next half decade. In 1922, Di Naye Welt — which had aligned itself with the Workers' Council organization in